8421671766 has 16 divisors (see below), whose sum is σ = 17575663104. Its totient is φ = 2685170664.

The previous prime is 8421671759. The next prime is 8421671767. The reversal of 8421671766 is 6671761248.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8421671767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30513166 + ... + 30513441.

It is an arithmetic number, because the mean of its divisors is an integer number (1098478944).

Almost surely, 2^8421671766 is an apocalyptic number.

8421671766 is an abundant number, since it is smaller than the sum of its proper divisors (9153991338).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8421671766 is a wasteful number, since it uses less digits than its factorization.

8421671766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61026635.

The product of its digits is 677376, while the sum is 48.

The square root of 8421671766 is about 91769.6669166888. Note that the first 3 decimals coincide. The cubic root of 8421671766 is about 2034.5393952177.

The spelling of 8421671766 in words is "eight billion, four hundred twenty-one million, six hundred seventy-one thousand, seven hundred sixty-six".